Reinforced concrete construction.



PATENTED JAN. 28

' R.'G. BROTHER REINFORCED CONCRETE CONSTRUCTION.

APPLICATION FILED JULY 16, 1906.

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' Specification of Letters Patentf Application filed July 16.1906.Serial No. 326.304.

Patented Jan. as, 1908,

To all whom it may concern:

Be it known that I, RICHARD G. REUTHER, a citizen 'of the United States,residing at Detroit, in the county of Wayne, State of Michigan, haveinvented certainnew and useful Improvements in ReinforcedConcreteConstruction; and I do declare the following to be a full,clear, and 'exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to thethereon, which form a part of this specification.

This invention relates to concrete and metal construction of the typecommonly known as reinforced concrete, and consists in the associationand arrangement of arts hereinafter fully set forth and pointe outparticularly in the claims.

[The object of the invention is to provide means whereby a concrete beamor span may be reinforced with metal chords or girders longitudinallyand with web members leading from said 7 chords, whereby the elements ofa truss are produced, the arrangement being'such as to secure themaximum amount of 'strength with a minimum weight of metal.

'The above object is attained by the structure illustrated in theaccompanying drawings, in which Figure 1 is a sectional view through aconcrete or cementitious body, showing the application of my inventionin trussing said body between its terminal supports. Fig. 2 is afragmentary view in perspective, showing the manner of associating themajor and minor members of the reinforcing metal.

Fig. 3 is an elevation ofthe structure shownbroken away, illus-- in Fig.1, parts being trating the employment of a second longi-. tudinal memberengaging the terminals of the inclined minor members. Fig. 4 is atransverse section through a cementitious body, showing the structureillustrated in Fig. 1. Fig. 5 is a similar view illustrating theapplication of the structure shown in Fig. 3. Fig. 6 is'a detail intransverse section as on line 6-6 of Fig. 3.

Referring to the characters of reference, 1 designates the major memberof the reinforcing metallic. members, which is placed of and within theconcrete or cementitious body 2 to correspond with the chord of a truss.The minor members 3 are figures .of reference marked.

connected with the major member and ere i tend at an incline therefromin opposite directions corresponding in their. function with the web ofa truss and transmitting the stress which is placed thereon to the majormember.

'The major memberl of the reinforcing 2 members is preferably formed ofa round, metallic bar of the requisite length and diameter for the workdesired. To provide web members 3 and connect them to the major memberin a manner to prevent weakening the major member, I form said minor orweb members of steel wire of a suitable gage, which is wrapped spirallyaround the major member, as shown at 4, and at recurring intervals inaclosed coil, as shown at 5, from which coil the wire leads outwardly andthe double strands thereof twisted together to form the web members 3,preferably provided with the loops 6 at their ends. Said web or minormembers are preferably formed in pairs, as shown, beingarranged todiverge from their common point ofattachment to the bar and beingpreferably inclined in the direction of the longitudinal axisof saidbar.

By employing a strand of wire from which to form the minor or webmembers, said members may be produced asjoften as the character of thework maydemand, and may be inclined in one'direction or in 0 p0- sitedirections, as desired, while the emp oyment of a round bar upon whichto mount the web members serves greatly to strengthen is wound about thebar 1 I the cementitious body because of the stiffness of said bar.

The s iral wrapping of the wire around the bar hol s said bar againstlongitudinal movement in the concrete bed, while th'e-securin of theends of the wire by passing its termina through the transverse 0 siteends of the bar, as s own at 7 in Fig, 6,

prevents the bar turning within the wrapping of wire.

In order to cause the bar to lie in a proper position while beingembedded in a cementitious body, the opposite ends of the wire areformed into thelaterallyprojecting loo s 8 which rest upon the supportfor the en s of the bar and hold the bar from tilting.

Where a greater carrying capacity is required than that afforded byshown in Figs. 1 and 2, additional bars 9 may members 3, where thestructures enings in the oppo- 110" be employed by assing them throughthe is distributed between the main bar '1', and'the 1 .7 ,loo )8 of can30,:

whole structure is tied together and theweigh-t auxiliary bars 9 throughthe medium of the minor members 3.

The structure shown in the drawing is that I what" I 0 im as new anddesire to Letters Patent, is: 1. Ina reinforced concrete structure, thecombination of a cementitious body, a long tudinal stremgthening bartherefor of relativelylarge diameter, a single metal strand ofrelatively small diameter Wound spirally around said bar. to extendfrom. end to end secure by thereof, ortions of said strand intermediate2,5, g

1 int'o pairs of vloops, each pair of loops being its ends cing drawnoutwardly at intervals formed .into minor stress members by twistingsaid 100 edportions oi the strand and the 2 pair being rigidly securedto the bar by having their base portions Wound directly therearound saidminor stress memin the cementitious body. A

hers projecting from the main member at an angle and' all of saidmembers being embedded 2. In arei-nforce'd concrete strudture, therco'mbination'with a cementitious body, of a longitudinally extendingstrengthening of relatively large diameter, a metal strand wra pedspirally around saidbar and extend ing om end'to end thereof, saidstrand intermediate its ends being drawn outwardly into loops andtwisted to form projecting minor stress members, and said strand havingits ends passed through the ends of the strcngthening bar to rigidlysecure the ends of the strand to the bar.

3. I In a reinforced concrete structure, the combination with acementitious body, oi a roundstrengthening bar of relatively largeHaving thus fully set forth my invention,

sniper diameter extending longitudinally thereof, a metal strand. wra'mecbsplrally around said bar, said strand intermediate its ends beingdrawn outwardly into loops and twisted to form diverging minor stressmembers, the ends of said strand being passed through the ends of saidher t6 rigidly secure the ends of thes'trandthereto, the ends of thestrand being 'l'or 'ned' 'lnto bearing members to prevent the barturning W hen placed in. position, and all of sai'dparts being embeddedin the cementltious body,

' 4 In a reinforced concrete structure, the

combination with. a cementitious body, of a rigid longitudinalstrongtheningbar of relatively large diameter, a plurality of minorstrengthening members consisting of-diverg ing twisted strands formed ofa single strand wound around the bar from end to end, said twistedStlI'flXKlSdwl ng connected in pairs along the bar and each pair beingrigidly connected to the bar to prevent independent move-- ment of saidparts and extending obliquely from said bar, said minormernbers havingloops in the outer ends thereof, an auXiliar longitudinal strengtheningbar passed throng each of the loops in said minor members and all ofSfild parts being embedded 111 said. (Jenn entitious body.

5. A reinforcing member for concrete con struction, com arising alongitudinally ex tending strengthening bar of relatively largediameter, a metal strand wrapped spirally around said bar and extendingfrom end to end thereof, said strand intermediate its ends being drawnoutwardly into loops and said loops being twisted to form divergingminor stress members, the base of said loops belng Wrapped directlyaround the strcngthenin bar and the ends of said strand being passedthrough the ends oi. the barto prevent independent movement of saidparts.

In testimony whereof, I sign this specification 111 the presence o'l'two Witnesses.

RIOI IARD G. REUTHER.

Witnesses E. b. WHE ELER, I. (3.. HoWLnrr.

